WW2 TCS Radio System
General Information: TCS Radio System
- Engineered and Manufactured by Collins Radio Company
- More than 35,000 units were produced by Collins
- Stewart-Warner, King Radio, and others also produced units
- Collins Model 51Q Receiver and 50Q Transmitter
- Designed for Portable and Mobile Service
- Suitable for installation where severe vibration present
- May be installed in Trucks, Ambulances, Motor Boats, Etc
- Units mounted in steel boxes, painted with Black crinkle finish
- Sub-assembly type of construction facilitates easy repair
- Power interlock switch removes power from unit out of cabinet
Power Supply
- Maximum power consumption with radio transmitter modulating
- DC power units are availiable in 12,24, 32, 115 and 230 volts
- AC power units are availiable in 115 and 230 volt/ 60 cycle
- DC Dynamotor Power Unit is 12 volt, 225vdc & 400vdc dynamotors
- Motor Generator Units: Change motor to suit source voltage
Transmitter
- Oscillator-Buffer-Amplifier Circuit
- Select one of four crystals or master oscillator frequency control
- Frequency range: 1,500 kc to 12,000 kc
- Bands of Operation: 1.5-3.0 mc, 3.0-6.0 mc, 6.0-12.0 mc
- Rugged construction for high stability frequency tolerance
- Voice operation with amplitude modulation of 90% minimum
- CW operation at 30 WPM maximum in master oscillator mode
- CW operation at 20 WPM maximum in crystal oscillator mode
- Audio frequency response 300 cps to 3,000 cps
- Microphone: Carbon microphone (100 ohm resistance type)
- Power Output: 20 watts Voice, 40 watts CW
- Crystals: 1,500 to 3,000 kc- 1st, 2nd, 3rd, 4th harmonic frequencies
- Tubes:12A6 Master Oscillator, 12A6 Buffer-Doubler
- Tubes:12A6 Crystal Oscillator, 1625 Modulators and RF Amplifiers
Receiver
- Superheterodyne Circuit
- Crystal or Master Oscillator frequency control
- One Stage of R-F Amplification
- Two Stages of I-F Amplification
- Frequency Range: 1,500 kc to 12,000 kc
- Crystal operation in all ranges, less sensitivity 6,000 to 12,000 kc
- Audio Output Power: 1 watt with less than 5% distortion, 1.5W maximum
- Sensitivity: 6 milliwatts audio with less than 15 microvolts input
- Selectivity: 9kc wide at 6db down, 30kc wide at 40db down
- Antenna Input: Designed for 20' Whip antenna, Switched by transmitter
- Tubes:12SK7 R-F Amplifier, 12SA7 Converter, 12A6 Master/Crystal Osc.
- Tubes: 12SK7 I-F Amplifers, 12A6 Audio Amplilfier, 12SQ7 Detector-BFO
Remote Control Unit
- Loudspeaker
- Power on/off
- Emmision selection- AM/CW
- Speaker/headphones selection
- Audio output level to speaker/headphones
- Microphone input jack
- Telegraph Key input jack
- Headphone jack
Accessories
- Antenna Loading Coil: In series with antenna, 6 inductance values
- Interconnecting Cables: TX to Power, Rx to Power, Control to Power
- Microphone: Single button Carbon, approxiamately 100 ohms resistance
- Telegraph Key: Standard type w/shorting lever
- Headphones: approxiamately 500 ohms impeadance
- Tools: #10 & #6 Bristo wrench (located inside Transmitter cabinet)
Last Updated: December 5, 1997
Last Updated: December 5, 1997